(b) Reciprocal Recognition of Rights. In the event Lessee shall have received from the lessor or secured party of any airframe leased to Lessee or owned by Lessee subject to a conditional sale or other security agreement a written agreement complying with clause (B) of Section 6(a)(i)(3) hereof (which agreement may be contained in the lease, conditional sale agreement or security agreement relating to such airframe), and the lease or conditional sale or other security agreement covering such airframe also covers an engine or engines owned by the lessor under such lease or subject to a security interest in favor of the secured party under such conditional sale or other security agreement, Lessor hereby agrees for the benefit of such lessor or secured party that Lessor will not acquire or claim, as against such lessor or secured party, any right, title or interest in any such engine as the result of such engine being installed on the Airframe at any time while such engine is subject to such lease or conditional sale or other security agreement and owned by such lessor or subject to a security interest in favor of such secured party.